any of several human or animal diseases characterized by dark urine resulting from rapid breakdown of red blood cells; -- used especially of blackwater fever, a severe form of malaria caused by the blood parasite Plasmodium falciparum.
Blackwater (waste) is a relatively recent term used to describe water containing fecal matter and urine. It is also known as "brown water", "foul" water, or as sewage. It is distinct from greywater or "sullage", the residues of washing processes.
Blackwater is the pollution produced from coal preparation. It contains copious amounts of hazardous substances, including carcinogenic compounds and heavy metals. Blackwater is permanently impounded in toxic waste facilities, as it cannot be processed into a form that can be returned to the natural environment.